from numpy import *
# arr=random.rand(4,4)
# randMat = mat(arr)
# # # print(arr)
# # # print(randMat)
# # print(randMat.I)
# # invRandMat=randMat.I
# # myEye=randMat * invRandMat
# # print(myEye - eye(4))
# # print(eye(4))


dic={}
dic["z"]=1
print(dic)
print(dic.get('z',0))



